Charles edwin punk



(No Model.) G. E. FUNK. PUMP.

No. 513,316. Patented Jan. 23, 1894.

THE NATIONAL umuelurmma COMPANY.

wAamNaYcN. n.

UNITED STATES PATENT OFFICE CHARLES EDWVIN FUNK, OF CHICAGO, ILLINOIS.

PUMP.

SPECIFICATION forming part of Letters Patent No. 513,316, dated January 23, 1894.

Application filed March 7, 1893.

To aZZ whom it may concern.-

Be it known that I, CHARLES EDWIN FUNK, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pumps; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in that class of pumps consisting essentially of a cylindrical casing, an elastic tube within the casing adjacent to the cylindric wall of the same and provided with outlet and inlet passages, and a revolving pressure device affording a moving pressure on the elastic tube and serving thereby to furnish a continuous stream of fluid through said tube.

The object of my invention is to provide an improved construction in pumps of this character, and to this end it consists in the matters hereinafter described and particularly pointed out in the appended claims.

In the accompanying drawings: Figure 1 is a sectional elevation of a pump embodying my invention, taken on the line 1-1 of Fig. 2. Fig. 2 is a similar view taken on line 2-2 of Fig. 1. Fig. 3 is a plan section taken on line 3-3 of Fig. 1. Fig. 4; is a partially sectional view showing the interior of the easing with the roller out of operative position.

As shown in the drawings, A designates the cylindrical outer casing, B the elastic tube within the same, and C a pressure roller revolubly supported at the center of the casing and adapted to afiord the moving pressure on the elastic tube B. As herein shown said tube is constructed substantially like that set forth in my pending application, Serial No. 465,023, filed concurrently herewith, it being molded in the form of a continuous ring of proper size to fit the interior of the casing, and with inlet and outlet ends B and B leading off radially (through an aperture (1 in the cylindric wall A of the casing) from adjacent points on the outer side of the tube; a transverse partition 13 being provided in the interior of the tube between the adjacent inlet and outlet ends B B. Said inlet and outlet ends may be connected by any suit- Serial No. 46 5,024. (No model.)

able pipe couplings b b with the supply and discharge pipes. The rotary support for the roller C is herein shown as provided by a radial arm D attached at its inner end to a rotatable shaftEextending through an aperture a in the center of the side wall A? of the casing A; the outer end of said radial arm D being forked to embrace the roller C and being provided with a transverse bearing pin D upon which said roller is journaled. A sleeve A secured to the inner side of the side wall about the aperture a affords a suitable length of journal bearing for the rotatable shaft E, and a crankarm F and handle F on the outer end of the shaft furnish, as shown in this instance, a convenient means of rotating said shaft.

Radial adjustment of the arm D and consequently of the roller C, is provided as follows: The inner end E of the shaft E is formed eccentric to the main portion E of the shaft and is rotatably engaged by an aperture d in the inner end of the radial arm D. Said arm D is held on the said eccentric portion, and is adjustably clamped in position by a set screw E extending through the collar eand engaging the arm D, the shaft E being, in thisinstauce, formed with a disk 6 at the juncture of its portions E and.E forming a retaining wall against which the arm D is thrust by the pressure of said clamping screw E WVhen said screwis loosened it is obvious that by swinging the arm D on the eccentric portion E of the shaftE as apivot, the roller 0 will be made to press with greater or less force on the tube B, and it may be clamped in any desired position by the tightening of said set-screw. When the arm D is adjusted in such position that the roller C is pressed against the tube B with sufficient force to flatten said tube, as shown in Figs. 1 and 3, the pump is ready for use and the turning of the crank F'in the direction indicated by the arrow in Fig. 1 will starta continuous stream of fluid through the tube from the inlet B to the discharge B To provide a positive engagement between the arm D in such position and the shaft E, the said arm is provided adjacent to the set-screw E with a segmental recess d the bottom of which may be engaged by the pointof the set-screw and the edge 61 of which may positively engage the set-screw and positively maintain the arm in said operative position. If it is desired to ease up on the pressure so that the roller may be moved more easily (when little pressure is required), the set-screw may be loosened and moved back from the edge d of the recess d and again screwed tightly against either the bottom of the recess or the side of the arm D beyond the recess. By means of this recess cl also, the adjustment of the arm D and roller C may be rendered automatic by simply advancing the point of the set screw E far enough to strike the edge (1 of the recess without engaging its bottom surface. With the set screw in this position it is obvious that the first rotary movement of the crank F willnotrotate the arm D until the set screw E has been carried around far enough to strike the edge (1 of the recess and that, in the meantime, the arm D will have been automatically thrown outward into operative position. Corrcspondingly when the crank F is released by the operator the pressure of the clastic tube on the roller 0 would automatically force the arm D inward out of operative position, the reaction of the arm D on the eccentric portion E of the shaft sufiicing to rotate said shaft sufficiently to permit such inward movement of the arm. As shown said set-screw E is provided with a milled head e by means of which it may be readily operated without the use of a wrench or screw-driver, and the adjacent side of the casing A is left open, as shown at a (Fig. 2) so that the interior parts are convenient of access. A handle A is also shown rigidly attached to the casing A and extending radially therefrom, said handle being intended to be grasped by one of the hands of the operator while his other hand is occupied in manipulating the crank F.

The particular form of pump illustrated in this instance is more particularly intended as a su rgeons pump for the transfusion of blood, but pumps similarly constructed and embodying the same principles may obviously be used for pumping purposes of various kinds.

I claim as my invention 1. A pump comprising a cylindric casing, an

elastic tube within the casing, a rotary shaft journaled at the center of the casing and provided with an eccentric portion within the casing, a radial arm apertured to pivotally engage said eccentric portion, a collar secured to the end of the eccentric portion to maintain the radial arm in engagement therewith, a set screw in said collar, and a recess in the radial arm adjacent to said set screw, the ends of said recess being located at unequal distances from the longitudinal axis of said radial arm, substantially as described. 2. A pump comprising a cylindric casing, an elastic tube within the casing, a rotary shaft journaled at the center of the casing and provided with an eccentric portion within the casing a disk formed on the shaft at the juncture of its main and eccentric portions a radial arm apertured to engage with the occentric portion of the shaft, a collar secured on the end of the eccentric portion to maintain the radial arm in engagement therewith a set screw in said collar, and a recess in the radial arm adjacent to said set screw, the ends of said recess being located at unequal distances from the longitudinal axis of said radial arm, substantially as described.

In testimony that I claim the foregoing as myinventionlaffix my signature in presence of two witnesses.

CHARLES EDWIN FUNK.

Witnesses: I

C. CLARENCE PooLE, HENRY W. CARTER. 

